function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gomes do Nascimento, Géssica Maria', 6],
    ['Ivanets, Viktoria & Wierzgoń, Mariusz & Yevchun, Hanna', 1],
    ['Liu, Yong-Ying & Quan, Yu-Ping & Wu, Yu-Huan', 2],
    ['Oliveira, Regigláucia Rodrigues de', 1],
    ['Osman, Imen Ben & Hugonnot, Vincent & Muller, Serge D.', 2],
    ['Price, Michelle J.', 6],
    ['Spence, John R.', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);